Basic Concepts_2

Basic Concepts_2 - Three unique developments in the last...

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Three unique developments in the last ~100 years have resulted in The Environmental Crisis Population explosion Urbanization Industrialization The Environmental Crisis is exemplified by increasing demands on resources and space, with increasing pollution and waste.
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Population growth resembles J-curve
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Population Growth Natural growth of population is difference between birth rate and death rate Growth reported as annual rate (percent) Average worldwide growth rate = 1.4 % (per year) Example of Increase in Population at 1.4 % Rate Initial pop. 1,000,000 After 1 year 1,014,000 After 2 years 1,028,196 After 3 years 1,042,591 After 4 years 1,057,187 Years 0 2 04 06 08 0 Population (millions) 1 2 3 4 Growth is Exponential
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<1% 1-1.9% 2-2.9% 3+% Data not available Annual world population growth Population Growth Rates Throughout the World Growth rates are highest in less-developed countries
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Years 0 2 04 06 08 0 1 0 0 Population (millions) 1 2 3 4 5 6 1.9 % 0.1 % Growth Rates and Doubling Time 36 yr Rate 70 DT yr 700 0.1 70 DT = = yr 36 1.9 70 DT = = Less-developed countries Ave. growth rate = 1.9 %
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Basic Concepts_2 - Three unique developments in the last...

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